King James Version
And it came to pass, when ye heard the voice out of the midst of the darkness, (for the mountain did burn with fire,) that ye came near unto me, even all the heads of your tribes, and your elders;English Standard Version
And as soon as you heard the voice out of the midst of the darkness, while the mountain was burning with fire, you came near to me, all the heads of your tribes, and your elders.New International Version
When you heard the voice out of the darkness, while the mountain was ablaze with fire, all the leading men of your tribes and your elders came to me.